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Finding the Fourth Proportional to 76,996.80, 106,156.80 and 63,148.08

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Solution

The fourth proportional to 76,996.80, 106,156.80 and 63,148.08 is: 87,063.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,996.80 : 106,156.80 = 63,148.08 : x
  2. Step 2: Convert to fraction form
    76,996.80/106,156.80 = 63,148.08/x
  3. Step 3: Cross multiply
    76,996.80x = 106,156.80 × 63,148.08
  4. Step 4: Simplify right side
    76,996.80x = 6,703,598,098.94
  5. Step 5: Solve for x
    x = 6,703,598,098.94/76,996.80
  6. Step 6: Final answer
    x = 87,063.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.